
.container{
    width: 600px;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
}
.btn{
    position: relative;
    width: 150px;
    height: 50px;
    margin: 20px;
    /* border: 1px red solid; */
}
.btn a{
    text-decoration: none;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    background: rgba(255,255,255,0.05);
    box-shadow: 0 15px 35px rgba(0,0,0,0.2);
    border-top: 1px solid rgba(255,255,255,0.1);
    border-bottom: 1px solid rgba(255,255,255,0.1);
    border-radius: 30px;
    color: #fff;
    z-index: 1;
    font-weight: 400;
    letter-spacing: 1px;
    overflow: hidden;
    transition: 0.5s;
    backdrop-filter: blur(20px);
}
.btn:hover a{
    letter-spacing: 3px;
}
.btn a::before{
    content:'';
    position: absolute;
    top: 0;
    left: 0;
    width: 50%;
    height: 100%;
    background: linear-gradient(to left,rgba(255,255,255,0.15),transparent);
    transform: skew(45deg) translateX(0);
    transition: 0.5s;
}

.btn:hover a::before{
    transform: skew(45deg) translateX(100px);
}

.btn::before{
    content: '';
    position: absolute;
    left: 50%;
    width: 30px;
    height: 10px;
    bottom: -5px;
    transform:translateX(-50%);
    background-color: #00f;
    border-radius: 10px;
    transition: 0.5s;
}

.btn:hover:before{
    bottom: 0px;
    width: 80%;
    height: 50%;
    border-radius: 30px;
}

.btn::after{
    content: '';
    position: absolute;
    left: 50%;
    width: 30px;
    height: 10px;
    top: -5px;
    transform:translateX(-50%);
    background-color: #00f;
    border-radius: 10px;
    transition: 0.5s;
}

.btn:hover:after{
    top: 0px;
    width: 80%;
    height: 50%;
    border-radius: 30px;
}

.btnr::before,
.btnr::after{
    background-color: #ff1f71;
    box-shadow: 0 0 5px #ff1f71,
    0 0 15px #ff1f71,
    0 0 30px #ff1f71,
    0 0 60px #ff1f71;
}

.btnb::before,
.btnb::after{
    background-color: #2bd2ff;
    box-shadow: 0 0 5px #2bd2ff,
    0 0 15px #2bd2ff,
    0 0 30px #2bd2ff,
    0 0 60px #2bd2ff;
}

.btng::before,
.btng::after{
    background-color: #13ea3e;
    box-shadow: 0 0 5px #13ea3e,
    0 0 15px            #13ea3e,
    0 0 30px            #13ea3e,
    0 0 60px            #13ea3e;
}